Horkelia cuneata var. sericea

(A. Gray) Ertter & Reveal

Novon 17: 319. 2007.

Common names: Kellogg’s or coast horkelia
Conservation concernEndemic
Basionym: Horkelia californica var. sericea A. Gray Proc. Amer. Acad. Arts 6: 529. 1865
Synonyms: H. cuneata subsp. sericea (A. Gray) D. D. Keck H. kelloggii (A. Gray) Rydberg H. sericea (Greene) Greene Potentilla kelloggii Greene P. lindleyi var. sericea (A. Gray) J. T. Howell
Treatment appears in FNA Volume 9. Treatment on page 255. Mentioned on page 254.

Plants grayish-sericeous; eglandular hairs dense, ascending to appressed, glandular-hairs obscured. Stems decumbent to ascending, 2–5 (–7.5) dm. Leaflets 5–10 per side, obovate, (5–) 10–25 (–30) mm, not distinctly pinnately veined. Inflorescences usually ± congested; most flowers arranged in glomerules. Pedicels 1–3 mm, proximalmost to 12 mm. Flowers: hypanthium interior rim densely pilose; petals oblanceolate, 1.5–3 mm wide; filaments 1–3 × 0.5–1 mm. 2n = 28.


Phenology: Flowering summer.
Habitat: Coastal stabilized dunes and hills, coastal scrub communities
Elevation: 0–200 m

Discussion

Of conservation concern.

Historic populations of var. sericea occurred along the immediate coast from Alameda and Marin counties south at least to Santa Barbara County, with some littoral collections of Horkelia cuneata from Los Angeles and San Diego counties having some sericea characteristics. Reports from farther north are all based on misidentifications, for example, of H. californica in Sonoma County. The most distinctive specimens are from the northern populations in Alameda, Marin, San Francisco, and San Mateo counties, all of which apparently no longer exist. Of the recently confirmed extant populations, those that come closest to justifying continued recognition of var. sericea are in Monterey, San Luis Obispo, and Santa Cruz counties.

Selected References

None.

Lower Taxa

None.

"/3lengthofsepals" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

rugose +  and smooth +
1.5mm +  and 1.8mm +
longer than wide +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
truncate +  and emarginate +
Barbara Ertter +  and James L. Reveal +
(A. Gray) Ertter & Reveal +
compound +  and simple +
opposite +  and alternate +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
flattened +
Horkelia californica var. sericea +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
planar +  and cylindric +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
reduced +
free +  and distinct +
Kellogg’s or coast horkelia +
open to congested +
not +  and aggregated +
0–200 m +
lanceolate +  and ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
flattened +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
obliquely ovoid +  and reniform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Coastal stabilized dunes and hills, coastal scrub communities +
ascending +  and appressed +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
glabrous +  and pilose +
0 +  and 1/2 +
0.1 cm1 mm <br />0.001 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
open to congested +  and open +
crassinucellate +
opposite +  and alternate +
marcescent +
winter-persistent +
separate +  and slightly overlapping +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
sparsely pilose +  and glabrate or sericeous +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 1.5 cm15 mm <br />0.015 m <br /> (?) +
oblanceolate +
palmate +  and pinnate +
shallowly toothed +  and deeply divided +
inferior +  and superior +
clustered +, biseriate +  and superposed +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
recurved +  and reflexed +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
0 cm0 mm <br />0 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
pilose +  and glabrous +
not arillate +
persistent +
free +  and distinct +
less reflexed +  and spreading +
lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
stramineous +, reddish +  and green +
decumbent +  and ascending +
1 +  and 10 +
palmate +  and pinnate +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
H. cuneata subsp. sericea +, H. kelloggii +, H. sericea +, Potentilla kelloggii +  and P. lindleyi var. sericea +
Horkelia cuneata var. sericea +
Horkelia cuneata +
variety +
10 +  and 15 +
oblanceolate +  and obovate +
inconspicuous +
enlarged +
green +  and grayish +
grayish-sericeous +